Streets... The version on Rattle And Hum... I readed somewhere one day that "doesn't matter if you don't like U2, you will get goosebumps listening to this version"
The question wasn't introduce u2 to someone who already knows u2...assume a complete blank slate...what's the song that you say "You HAVE to listen to this!"
The song that first hooked ME was I Will Follow (Live UBARS). I was reeled in by All I Want Is You, then absolutely knocked out by Mysterious Ways.
Can't describe band like U2 by one song. You can describe Rolling Stones by Satisfaction or Jumping Jack Flash, but U2 are what they are because of the variety, style changes. If you pick for example Streets, what about 90's? It was something totally different. Mission impossible